In theory your items should be fitting through that 2 cm slot at every post office or postal outlet, but I'm not surprised that the fact differs from the theory.
Remember that the reason for the 2 cm maximum is that thicker items may get caught in 'the machinery', and if you've ever had the horror of visiting a PO terminal (bring ear protection!) you will understand that this will not only destroy your own package but possibly few other innocent packages too.
It's under the venture one program that i got 15% to 20% discount
???
You can get a 5% to 18% discount on certain parcel rates if you print your labels through Paypal. Neither Canada Post nor PP offer any discount on letter rates.
Venture One only offers a 5% discount.
You can buy discount mint postage on eBay. I'm out at the moment, but look for 'Canada Postage Lots' as your Search. Do NOT purchase lots without gum. These have almost certainly been soaked off mail and are illegal to re-use. (A stamp is a receipt for a service that has not been given. Once they have been used they are no longer valid.) Also those no gum stamps are a pain to fuss with.
